Vol. I. Sun —Cambrian Faunas of North China (iv) 85 



Fixed dieeks very broad, the greatest width of the fixed cheeks opposite the 

 palpebral lobe is nearly equal to the frontal width of the glabella; they rise up 

 moderately from the dorsal furrow to the palpebral lobe; dorsal furrow deep and distinct. 



Frontal border with the same convexity as the fixed cheeks, with a regularly 

 rounded frontal margin and separated from the glabella by a distinct frontal groove. 



The course of the facial suture is rather remarkable, it curves first from the middle 

 part of the frontal border with a regularly rounded arc to the anterior part of the 

 palpebral lobe, and curving around this extends outward and back'ward so as to cut the 

 free cheeks from the genal spine of the cranidium. 



The postero-lateral limb becomes abruptly depressed, forming a subtriangular 

 area. Genal spine pronounced, long and slender extending outward at about an angle of 

 45° with the longitudinal axis and forming a part of the fixed cheeks. 



Thorax, free cheeks and pygidia are not known. 



Cranidium faintly marked by pustules under a strong lens. 



Because this form has the genal spines or genal angles on the fixed cheeks, it 

 belongs to the order Proparia. 



The members of this order are very common from the Ordovician onwards but 

 are rarely found in the Cambrian strata. 



Dr. C. D. Walcott mentioned that two Chinese Cambrian genera-Daviesella and 

 StepJianocare-have the characters of the order Proparia. But in the typical form of this 

 order, the genal spines and the genal angles coincide and form one part of the fixed 

 cheeks. Probably Damesella and Stephanocare may belong to a suborder of the Proparia; 

 but the genus Wongia is quite distinct and certainly belongs to the typical form of the 

 order Proparia. 



I take extreme pleasure in naming this new genus Wongia in honor of Prof. W. 

 H. Wong, President of the Geological Society of China and Director of the national 

 Geological Survey. 



Genotype- TFongfia triangulata Sun. 



Wongia triangulata Sun (gen. sp. nov.) 



Plate V, Rgs. 12a-b. 



This species is represented by four individuals in one fossil band ; only cranidia 

 are known. 



